Occupational fire hazards can cause great destruction. The Great Fire of London and Rome were examples of great fires that started in shops selling flammable goods. Both caused massive damage and reclassified acceptable practices as dangerous. In the modern world, we need to avoid occupational fire hazards in order to prevent catastrophic damage to our properties and livelihoods. Listed below are some of the most common causes of fire. Read on to learn how to prevent these tragedies and how to minimize your exposure to them.
Fuel
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Oxygen
Oxygen and fire play a central role in the carbon cycle. This is because oxygen is needed for burning carbon, and without it, the Earth will not be able to support life. Therefore, fires play a critical role in maintaining the oxygen balance in the atmosphere. However, scientists still do not fully understand how fires affect the carbon cycle. For this reason, there is a great deal of controversy surrounding the connection between fire and oxygen.
Heat
A fire is a rapid chain reaction involving flammable or combustible materials and a sufficient amount of oxidizer. A fire starts when a flammable material is exposed to sufficient heat and oxygen, resulting in a high-temperature flame. The heat is transferred from the fuel to the oxygen, which in turn ignites the gases being emitted. The heat transferred by fire makes the flame grow, and the combustion products are carbon dioxide and water. Unless these elements are present, fire will not occur. Once it has all of these ingredients, it can spread and start a new fire somewhere else.
Convection
When a fire begins, it is the process of convection that makes it dangerous. Convection is the movement of hot air within a medium. In a fire that has been confined to a small area, convection is the primary mode of heat transfer. In such a situation, the fire will spread from place to place because the smoke will rise. It will also pass through gaps and holes in walls and floors.
Rate of spread
A fire’s rate of spread is measured in chains per hour. The rate of fire spread is directly proportional to changes in wind speed. Wind speeds increase when a fire is burning on a uniform fuel bed. The wind increases the rate of fire spread by up to three times. Wind gusts also affect the rate of fire spread. Wind speeds increase in a variety of conditions, including lightning strikes and lightning storms. Fortunately, firefighters can control the speed of fire spread by adjusting firefighting techniques to suit the conditions.